Professor Fonagy is one of the key international figures in the evaluation of mental health interventions. He holds Chairs at UCL, Harvard, Yale and Baylor, and is a NIHR Senior Investigator. In the 1990’s, he co-led the NHS Review of Psychotherapies, evaluating all outcomes data which provided the basis for the radical policy change, Improved Access to evidence-based Psychological Therapies (IAPT), now an important part of the NHS mandate. The report ‘What Works for Whom’ has over 3,000 scholarly citations. Since 2010, he has led the Children and Young People’s Programme for IAPT and achieved a doubling of the Government’s financial commitment to this service transformation programme for CAMHS services to be restructured using evidence based, patient centred therapies. He is a key figure in developing NHS mental health strategy through NICE guidance and chaired the Depression in Children and Young People GDG and co-ordinated the prevention section of guidelines for Antisocial Personality Disorder and Conduct Disorder. He led the development of National Occupational Standards for Psychological Therapies and Chaired the Advisory Group leading to the introduction of routine outcomes assessment in mental health services (HoNOS). He served on several UK Government panels and on the Academic Advisory Board of the Presidential Commission on Violence Prevention, chaired panels at NIMH and the German Research Foundation, and was a UK representative on the Expert Psychological Panel of the European Science Foundation EIRH Programme. He is PI or co-PI on evaluation research programmes in excess of £15M, is Programme Director on the UCLP mental health programme and is leading the largest Clinical Psychology Department and training scheme in the UK, with 150 doctoral students.